Fix JavaScript errors in chromium.

gulpfile.js

@@ -50,7 +50,7 @@ gulp.task('css', function() {
 // Catches all font files from all bower components.
 gulp.task('fonts', function() {
     return gulp.src(mainBowerFiles({
-            filter: /\.(eot)|(svg)|(ttf)|(woff)$/
+            filter: /\.(eot)|(svg)|(ttf)|(woff)|(woff2)$/
         }))
         .pipe(gulp.dest(path.join(output_directory, 'fonts')));
 });

openslides/agenda/static/js/agenda/agenda.js

@@ -86,7 +86,8 @@ angular.module('OpenSlidesApp.agenda.site', ['OpenSlidesApp.agenda'])
 
     // get a 'flat' (ordered) array of agenda tree to display in table
     $scope.flattenedTree = buildTree(tree.data);
-    function buildTree(tree, level = 0) {
+    function buildTree(tree, level) {
+        var level = level || 0
         var nodes = [];
         var defaultlevel = level;
         _.each(tree, function(node) {